Two factors affecting interferon synthesis in chick embryo cells: interferon depressor and aged-medium factor.
D000818:Animals; D002642:Chick Embryo; D046508:Culture Techniques; D006358:Hot Temperature; D007372:Interferons / Q000096:biosynthesis*; D009522:Newcastle disease virus / Q000254:growth & development; D014357:Trypsin / Q000494:pharmacology
D007372:Interferons; D014357:Trypsin